F3215-HP Load Balancing Module Network Management Configuration Guide-6PW101

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Configuring IPv6 BGP
This chapter describes only configuration for IPv6 BGP. For BGP-related information, see "Configuring
BGP."
The term "router" in this document refers to both routers and LB modules.
IPv6 BGP can be configured only at the CLI.
IPv6 BGP overview
BGP-4 can only carry IPv4 routing information.
To support multiple network layer protocols, IETF extended BGP-4 by introducing Multiprotocol Border
Gateway Protocol (MP-BGP). MP-BGP for IPv6 is called "IPv6 BGP" for short.
IPv6 BGP puts IPv6 network layer information into the attributes of Network Layer Reachability
Information (NLRI) and NEXT_HOP.
The NLRI attribute of IPv6 BGP involves the following:
• MP_REACH_NLRI—Multiprotocol Reachable NLRI, for advertising reachable route and next hop
information.
• MP_UNREACH_NLRI—Multiprotocol Unreachable NLRI, for withdrawal of unreachable routes.
The NEXT_HOP attribute of IPv6 BGP is identified by an IPv6 unicast address or IPv6 local link address.
IPv6 BGP has the same messaging and routing mechanisms as BGP.
IPv6 BGP configuration task list
Task Remarks
Configuring IPv6 BGP basic
functions
Specifying an IPv6 BGP peer Required.
Injecting a local IPv6 route Optional.
Configuring a preferred value for routes from a
peer or peer group
Optional.
Specifying the source interface for establishing TCP
connections
Optional.
Allowing the establishment of an indirect EBGP
connection
Optional.
Configuring a description for an IPv6 peer or peer
group
Optional.
Disabling session establishment to an IPv6 peer or
peer group
Optional.
Logging IPv6 peer or peer group state changes Optional.